The phrase "solution once and for all" is correct and usable in written English.
You can use it to emphasize that a particular solution resolves a problem in a lasting way. For example, "We need to find a solution once and for all for this ongoing issue."
"I think we need to get to a solution once and for all for the over-crowding in Treganna which has been going on for too long.
Will Israel bury the two-state solution once and for all, or can it somehow retain a hope of being a Jewish democratic state living in peace with its neighbors?
The radical right-winger then added: "I personally believe if we can remove these partisan roadblocks, that we can get to a moment where we're going to have a solution once and for all for this problem and hopefully in time to prevent an austerity-like debt crisis".
That there is no once-and-for-all solution to it, or to the problems of the tax code, is a poor reason not to at least try to clean up from time to time.
I have suggested that there is no once-and-for-all answer.
"There has to be a structure solution that once and for all separates infrastructure from supply and generation," she said.
We should have found a solution to it once and for all a long time ago.
Now I believe a solution is needed once and for all.
The creation of multidisciplinary teams of the relevant areas, along the value chain of the industry (exploration, production, transportation, refining, and marketing/retail), is desirable for proposing integral solutions that resolve the problems once and for all, avoiding propagating other problems in a different segment of the chain.
The new Israeli prime minister, whoever he or she may be, will be successful in concluding negotiations toward a two-state solution only if the Palestinians realize once and for all that they will not now or ever receive 100percentt of their dreams.
Boehner said he believed the solution was to "scrap this law once and for all," but conceded that both disagree on dismantling Obamacare all together.
